package string;

public class StringStringBuildDemo {
    public static void main(String[] args) {
        String a="a";
        for (int i = 0; i <10000 ; i++) {
            StringBuilder builder=new StringBuilder(a);
            builder.insert(0,i);
            System.out.println(builder);
        }
        System.out.println("执行完毕");

    }

}
